Metallic joint



(No Model.)

I. PUNK.

METALLIC JOINT.

Patented Feb. 19, 1889 INVENTO UNITED STATES PATENT OFFICE.

FRANK FUN K, OF DECATUR, ILLINOIS.

METALLIC JOINT.

SPECIFICATION forming part of Letters Patent No. 398,321, dated February 19, 1889.

Application filed July 18, 1888x Serial No. 280,298- (No model.)

To all whom it may concern.-

Be it known that I, FRANK FUNK, of the which the following is a specification.

My invention is designed to join a sheetmetal body to a sheet or cast metal bottom in a manner to form a water-tight receptacle that may be subjected to a high degree of heat without alteeting the joint.

In the drawings accompanying and torming a part of this specification, Figure l is a bottom view of a receptacle having its bottom jointpartly formed in accordance with my invention. Fig. 2 is an elevation of the lower portion of a receptacle with a portion broken away to show the manner of forming the joint. Figs. 1- it, and 5 are sectional views of a fragment/oi joint in various stages of completion.

The bottom u has the upwardly-projecling rim a, to which the body e is secured by rivets d. The bottom is convex at its lower edge, and a continuation, b, of the body 6 extends below the rivets and forms an angle with the curved edge of the bottom. After the body has been secured to the bottom with rivets, as shown in Fig. 3, a packing, as asbestus, is tamped into the angle, as shown in Fig. 4. The joint is then completed by bending the continuation I) over the packing and closely against the bottom, as shown in Fig. 5.

, of cast metal. city of Decatur, county of Macon, and State of Illinois, have invented certain new and useful Improvements in Metallic Joints, of

In Fig. 2 the bottom is shown as composed In Figs. 3, I, and 5 bot-h body and bottom are formed of sheet metal.

The packing c is preferably of asbestus; but I do not consider it impossible that other substances are known or may be discovered that will meet all requirements, and therefore I do not wish to be understood as confining myself entirely to that material.

In the use of my device no serious leakage is apt to occur even though the vessel is subjected to a shock that would start another joint. The water or other fluid will percolate but slowly through the packing when the conjoining metal is somewhat displaced.

I have found the joint desirable in the construction of tank-heaters 1'. a, heaters submerged in tanks to prevent-water from freezingand other uses are readily apparent.

I claim- The joint comprising the part u, having rim o the part c, riveted to the rim, the part b, bent over on part a, and the packing c, inter posed between a and b, as and for the purpose set forth.

In iestimony whereof I sign my name in the presence of two subscribing witnesses.

FRANK FUNK.

Attest:

ALBERT T. SUnMERs, L. P. GRAHAM. 

